The FM200 knife gate valve is a uni-directional slurry valve for shutting off solids-laden, viscous and abrasive media in industrial pipelines. A sharp-edged stainless steel gate plate travels through the medium like a guillotine. As a result, it cuts fibres, sludge and granulates instead of getting stuck. The FM200 is FERGO’s best-selling knife gate valve and offers the widest range of sizes and seats in the portfolio.
The wafer body fits between standard flanges to EN 1092-1, while the face-to-face length follows EN 558 series 20. In addition, all knife gate valves carry the CE mark under the Pressure Equipment Directive 2014/68/EU.
Technical Data of the FM200 Knife Gate Valve
- Nominal sizes: DN50 to DN1200
- Flange connection: PN10 standard (PN16, ANSI 150 on request)
- Face-to-face length: EN 558 series 20
- Design: wafer body – also available as lug type
- Sealing: uni-directional
- Operating temperature: −20 °C to +120 °C (elastomer), up to +400 °C (metal seat)
- Max. operating pressure: 10 bar
Body and Gate Plate Materials
- Cast iron GG25: standard solution for sewage plants, wastewater, pulp and paper, power plants and mining. Epoxy or polyester coating – the most economical version.
- Ductile iron GGG40: higher mechanical strength for applications at risk of pressure surges.
- Stainless steel 1.4408 / 1.4571: for chemicals, food processing, pharmaceuticals and aggressive suspensions. Hygienic and corrosion-resistant.
- Gate plate: 1.4301, 1.4408, 1.4571 or Hardox for highly abrasive media
Pneumatic, Electric or Manual – Eight Actuation Types
- Handwheel, rising stem: valve position visible at a glance – standard for rarely operated shut-off points
- Handwheel, non-rising stem: space-saving where installation height is limited
- Pneumatic knife gate valve, double-acting: fast switching cycles for automated process plants – also available with a protective cover against contamination
- Pneumatic, single-acting (fail-close): the spring closes the valve if compressed air fails – for safety shut-offs
- Quick-closing lever: the plate closes in one lever movement – for silos, dosing systems and emergency shut-offs
- Electric motor (AUMA): remote operation via 4–20 mA or fieldbus
- Gearbox with handwheel: for large sizes with high torques
- Chain wheel: for hard-to-reach installation positions
Seven Seat Materials – from Elastomer to Metal
- NBR: mineral oils, hydraulic fluids, greases (up to +80 °C)
- EPDM: water, hot water, wastewater, alkalis (up to +120 °C)
- Viton (FKM): acids, hydrocarbons, higher temperatures
- Silicone: food and pharmaceutical applications
- PTFE: universal chemical resistance
- Flucast ABP: highly abrasive media, mining slurries
- Metal: steam, fly ash, cement, temperatures up to +400 °C
FERGO also supplies the gland packing in PTFE, graphite, PTFE+NBR, PTFE+EPDM or PTFE+Viton.
Applications of the FM200 Knife Gate Valve
- Sewage plants and municipal wastewater
- Pulp and paper industry – fibre suspensions
- Chemical and petrochemical process plants
- Food processing and pharmaceuticals (stainless steel)
- Power plants – fly ash, gypsum slurry, flue gas desulphurisation
- Mining and cement – highly abrasive slurries (Hardox plate)
- Silo filling and discharge of granulates and bulk solids
Compared with butterfly valves or ball valves, the FM200 has a clear advantage: the gate plate cuts through solids instead of blocking them. This reduces clogging, maintenance and downtime. At the same time, the FM200 combines low purchase costs with high availability from stock.
Buy the FM200 Knife Gate Valve Online at FERGO
FERGO stocks the FM200 knife gate valve in all material, seat and actuation combinations – order now in the shop. For bi-directional sealing, FERGO offers the FB200 knife gate valve up to DN600 and the dead-space-free FB700 with scraping effect. For silos, the FG400 silo gate valve is available. Finally, for special materials (duplex, Hastelloy, titanium) or special sizes, contact FERGO via the custom solution page.
